opencv3/C++视频中叠加透明图片

#include<opencv2/opencv.hpp>
using namespace cv;

//PNG透明图片叠加到视频
int main()
{
Mat frame;
VideoCapture capture;
capture.open(0);
if(!capture.isOpened())
{
printf("can not open the camear......\n");
return -1;
}
namedWindow("mask", CV_WINDOW_AUTOSIZE);
namedWindow("output", CV_WINDOW_AUTOSIZE);
while (capture.read(frame))
{
//翻转摄像头图像
flip(frame, frame, 1);
Mat image = frame;
for (int i = 1; i < 11; i++)
{
char filename[100];
sprintf(filename,"E:/image/image/00/%d.PNG",i);
//灰度图
Mat grayPng = imread(filename,0);
threshold(grayPng,grayPng,180,255,CV_THRESH_BINARY);
//掩模反色
Mat mask = 255 - grayPng;
imshow("mask",mask);
//读取背景透明的PNG图像
Mat png = imread(filename);
Mat imROI;
imROI = image(Rect(200,20,png.cols,png.rows));
png.copyTo(imROI,mask);
imshow("output",image);
//替换新图
image = frame;
waitKey(10);
}

}
waitKey();

return 0;
}